<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <!-- 登录表单 -->
      <div>
        <el-form
          ref="loginFormRef"
          :rules="loginFormRules"
          class="login_form"
          :model="loginForm"
          label-width="80px"
        >
          <!-- 用户名 -->
          <el-form-item label="用户名" prop="username">
            <el-input
              v-model="loginForm.username"
              prefix-icon="iconfont icon-user"
            ></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item label="密码" prop="password">
            <el-input
              type="password"
              v-model="loginForm.password"
              prefix-icon="iconfont icon-3702mima"
            ></el-input>
          </el-form-item>
          <el-form-item class="btns">
            <el-button @click="login" type="primary">登录</el-button>
            <el-button @click="resetLoginForm" type="info">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 表单数据对象
      loginForm: {
        username: 'tomxwd',
        password: 'tomxwd'
      },
      // 表单验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在3到10个字符', trigger: 'blur' }
        ],
        password: [
          {
            required: true,
            message: '请输入密码',
            trigger: 'blur'
          },
          { min: 6, max: 15, message: '长度在6到15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置表单数据
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      // 表单预验证，返回布尔值 第一个参数是是否通过校验，第二个obj是校验未通过的错误信息
      this.$refs.loginFormRef.validate(async (valid, obj) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post('/login', this.loginForm)
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
        } else {
          this.$message.success(res.meta.msg)
          // 保存token到sessionStorage中，这里后台没写token 意思一下保存用户名即可
          window.sessionStorage.setItem('token', res.data.username)
          this.$router.push('/home')
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 10px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #eee;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
